Doc. SIE10169 Rev. 13 Page 5 of 32
1 INTRODUCTION
The circuit breaker analyzer and microOhmmeter model CBA2000 is a two-in-one test set.
When used as a circuit breaker analyzer, it allows the off-line testing of the characteristics of all
modern MV and HV circuit breakers. The test set measures CB operation times as they are defined
in the IEC standard 62271-100; in particular:
. Opening time: see 3.7.133;
. Closing time: see 3.7.136;
. O-C time: see 3.7.139;
. C-O time: see 3.7.143;
. Minimum trip duration: see 3.7.146;
. Minimum close duration: see 3.7.147.
When used as a microOhmmeter, it allows measuring the contact resistance of the circuit breaker
contact, or also of joints or other circuit parts. It allows also to perform the dynamic test of the
contact resistance, that is to record and display how does the contact resistance change while it is
closing: this allows detecting hidden defects, that are otherwise impossible to be diagnosed.
The instrument performs the following features:
Test set control: via keypad plus selection knob plus dedicated keys, and a large transflective LCD
display (320 x 240 pixels; view area 122 x 92 mm).
. Optional internal thermal printer 58 mm wide or external thermal printer 112 mm wide.
. Huge recording capability: 256 Mb (typically 500 results).
. Capability to transfer results directly to an USB pen drive
. USB and RS232 interface for data communication with the PC.
. Two driving coil circuits (O+C); 4 optionally available. The coil current is independently
measured on all outputs, with three current ranges.
. Three sets of two main contact sensing circuits (two chambers tests); optionally, three sets of four
or six main contact sensing circuits (four or six chambers test).
. Capability of controlling up to four test sets, for tests of CB’s with up to 24 chambers per phase.
. Test of the main contact and of the pre-insertion resistor.
. Four auxiliary input circuits; optionally, 8 or 12.
. For the main and event inputs, measurement of delays with respect to coil currents or other
references.
. The Open or Closed state of main and event inputs is displayed by a light: thanks to these lights,
the status of the circuit breaker is continuously monitored.
. Eight analog input measurement circuits, to be selected among the following:
- Coil current measurement: minimum 2, maximum 4;
- Two high AC or DC voltage measurement: up to 500 V DC or 350 V AC, for the measurement of
the standby battery or of the motor supply;
- Four low DC voltage measurement inputs, for the measurement of position transducers stroke and
speed, or of the pressure, or other low-level parameters.
. DC voltage source for potentiometer transducers polarization.
. One auxiliary relay output, programmable.
. Static resistance measurement; test current 200 A, 100 A or 20 A.
. Dynamic contact resistance test; test current 200 A, 100 A or 20 A.
. Many triggers can start the recording.
. Capability of generating or sensing a trigger, so that a number of units can operate at the
meantime.
. All possible test sequences are programmable.
Shop for Power Metering products online at:
1.877.766.5412
www.
PowerMeterStore
.ca
